The Yamaha outboard is a lot different than the automotive engine, so steer clear from common automotive engine oils. Use motor oil that is designed especially for the harshness of the marine environment, such as Yamalube® 4M and Yamalube® 2M that are designed for 4 strokes and 2 stroke outboards respectively.
Why should you be using it?
The main reason behind it is that the summer is gone in the US and it is time to prepare your boat for the winter season. As there won’t be nearly any activity in the cold season so your boat might stay still at the dock. It is important to check on oil in the outboard to see if it will be able to survive in the harsh weather of winter. Some other reasons to keep your engine maintained are:
Engine Load: The usual weight that you place on your outboard is quite heavier than you carry on your automobile so it is necessary to beat a far greater sum of drag to generate performance. It means your outboard has a lot more load than the engine of your automobile. Yamalube oils consist of exact anti-wear additives to counter this.
Engine Speed: The outboards works at a greater RPM rate than the engine of your automobile. So it must rev higher to create quicker speeds, instead of simply shifting gears of your car. Which means your outboard might go on for the whole day at 4500 to 6000 RPM, instead of a car that goes 2500 RPM at top speeds.
It becomes really hard on your oil which can exactly cut off (or break) molecules present in any common oil which results in reduced lubricity. Yamalube 2M and 4M have extraordinary cut off steady polymers to fight this and give high lubrication every single time.
Working Temperature: Outboards get cooled through raw water, which is quite cool to really cold. Saltwater will turn into crystals if its temperature goes beyond 170 F, which will result in choking of cooling passages and will result in the overheated engine and cause severe damage. You should also run up to working temp before changing your oil with cheap oil change kits.
Due to these two factors, your outboard works full time at a temperature that is much cooler than automobile and needs a very different kind of lubricating oil. Yamalube marine oils contain dispersants, detergents and viscosity index enhancers to meet such marine condition challenges.
Working Environment: As your outboard is continually at the water, getting in very humid air directly from the surface of the water to operate. This humid air also goes into combustion chambers by means of valves when not under use.
As in a saltwater environment, the air is much more corrosive. It is one of the worst environments that you can think of for an engine. Yamalube marine oils are designed especially to use special anti-corrosion agents that fight and prevent the effects of corrosion for such environments.
Comparison To Other Oils
Yamalube outboard engine oils give exact protection that isn’t included in other oils, making use of numbers of anti-wear, corrosion inhibitors, dispersants, detergents, shear stable polymers, viscosity index, and enhancers. In simple words, they are a lot superior to any other engine oil in the state of strength, durability, corrosion resistance and protection.